Electric signaling device.



- R. (LNEVIN. ELECTRIC SIGNALING DEVICE.

APPLICATION FILED DEC. 29, 1910.

Patented Oct. 8, 1912.

2 SHEETSSHEET 1.

WITNESSES INVENTOIQ.

ZQOY. C'NEVIA/ G? W AW- R. G. NBVIN. ELECTRIC SIGNALING DEVICE.

\ Y APPLICATION FILED DEC. 29, 1910.

Patented Oct. 8, 1,912.

2 SHEETS-SHEET 2.

Eras

Fza 9 WITNESSES Roi/ 233 through the parts shown in Fig. 3, the plane atright angles to the plane Electric Signaling Device, of which thefolclearterms as will enable those skilled in the i will be easilyapplied to the ordinary telesignaling.

provide a calling device which will be easily regulating'the descent ofthe circuit breaker.

' herein is shown applied to a desk telephone,

- UNITE sTATEs ure 1 BEST AVAILABLE COP ROY C. NEVIN, 0F BERKELEY,CALIFORNIA.

ELECTRIC SIGNALING DEVICE.

Specification of Letters Patent. Application filed December 29, 1910.Serial 110.:599543.

Patented Oct. 55,1912.

To all whom it may concern:

Be it known that I, ROY C; Nnvrn, a citizen of the United States,residing at Berkeley, in the county of Alameda and State of California,have invented a new and useful lowing is a specification in such fulland art to construct and use the same.

This invention relates to a signaling device for sending electricalimpulses, and its particular-obj ect is to provide a device which phonefor use with the so called automatic telephonesystems, and also for firealarm A further object of the invention is to installed in the desktelephone without in any way interfering with the general shape thereof.

Another object of the invention is to provide means whereby the timingof the impulses in the circuit may be regulated, an air cushion beingused for thepurpose of While the signaling apparatus shown it will beclear to those skilled in art that it may equally well be applied to anyother form of telephone or to any electrica signal sending apparatus. i

In the drawings inwhichthe same numeral of reference is applied to thesame portion throughout the several views, Figis a front elevation of adesk telephone equipped with this invention, applied to. what is knownas a two wire system. Fig. 2 is a front elevation of the telephone baseand the removable front to which the shownin section. Fig. 411s afviewin section of section being of; Fig. 3. Fig. .5 is a view of thecircuit breaking springs assembled. Fig. 6 is a view of .one of thecircuit breaking springs. Fig. 7 is a view in side elevation of theshort circuiting spring. Fig. 8 is a back view in elevation of thecircuit breaking spring. Fig. 9 is a side elevation of thecircuitbreaking spring. Fig.

10 is an elevationfof the back contact "bar;

Fig. 11 is a side elevation of the contact bar, and Fig..12 is a viewpartly in section of the circuit breaking piston.

The numeral 1 is applied to the telephone base above which extends thestandard 2 having the usual receiver fork 3 uponwhich the receiver 4 maybe hung. The telephone standard'2 carries a transmitter 5 secured"thereto in any desired manner. The telethereof has a removable portion6, said removable portion being seciired to the stand ard 2 by means ofscrews 7.

In order to give the suitable grip on the telephone and to preventinterference with the operation of the calling device, a removable plate8 is secured to the part 6 by means of screws 9. The plate 8 is "spacedfar enough away from the member 6 to permit the finger plate 10 to slideup and down between said plates (5 and 8. The finger plate is providedwith any desired series of ndtches as indicated on Fig. 1, and the plate8 determines the height to which the plate 10 may be lifted.

Within the member 6 there is secured a c linder 11 of slightly smallerdiameter than t e inside of the standard, and said cylinder has'anopening in the bottom thereof. On

the side of the cylinder 11 there is a very small hole 13 in which theend of a screw 14 seats,

said screw affording the means whereby the escape of air from thecylinder 11 is regulated,a ball 15 entirely closing the hole 12 upon thedown stroke of the piston 16. i The piston 16 is provided with a groove17 around its outside near the bottom thereof,

and a groove leads therefrom to the top thereofgto facilitate the escapeof air from the cylinder 11, and it is provided with a notched rack 18within the same, said rack extending downwardly from the top a suit abledistance to make the desired number of calls. The piston 16 is connectedby means of a bar 18 with the finger plate 10.

Connected to the plate 6 near the lop thereof, there is an insulationblock 20, said block being secured to the plate 6 by llllillm of screws21 and being adjusted in its pusltion by the movement of said block withrcspect to said screws 21, slots 22 being provided for this purpose.Secured to this block 20 and insulated each from the other, are threesprings 23, 24 and 25, said springs depending from-said block 20 tothetop of the cylinder 16, Each of these springs is provided with asuitable connection 25,26

and 27 to the proper parts ofthe telephone, The spring 23 lies on theoutside and has a cured thereto; the object of which is to short circuitout the receiver and transmitter of the telephone when the circuit isbeing made and broken by the rack 18, said point 30 being permitted tocome into contact with the spring 25 whenever the cylinder 16 is raised.The spring 2A depends from the block 20 adjacent the spring 23 and ithas a.contact point 32 and a pawl 33, the latterpermitting the rack torise without disturbing the circuit, while it causes the contact point32 to move away from the bar 25 upon the descent of the cylinder ,16,said contact breaking the circuit oncefor each point of the rack 18passed over.

Since it may be desirable to change .the speed at which the piston '16will fall, it can be accomplished by pushing the screw 14 nearer to orfartheraway from the hole 13 as may be desired.

The operation of the apparatus is as follows :IVhen it is desired tocall a number, the plate 10 is lifted by inserting the finger in theproper opening and lifting the plate until the finger comes into contactwith the plate 8, whereupon the piston is permitted to fall. Immediatelyupon lifting the piston the foot 28 will pass out of contact with theblock 29 and the receiver and transmit ter will be short circuited outof the line,

thus making all of the calls independent of the receiving andtransmitting mechanism.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent of the United States, is as follows p 7 1. Inan electric signaling device the combination of a telephone standard, anelectric circuit, a cylinder within the telephone standard, a pistonslidable therein, means connected with said piston to break said circuita given number of times, means to permit the free upward movement ofsaid piston, and means to regulate the speed of the ineosse downwardmovement of said piston, substantially as described.

2. In an electric signaling device the combination of a telephonestandard, an electric circuit,- a cylinder within the telephonestandard, a piston therein, means connected with said piston to breaksaid circuita given number of times, a finger plate to raisesaid piston,means to permit the free upward movementof said piston, and means toregulate the downward movement thereof, substantially as described.

3. In an electric signaling device the combination of a telephonestandard, an electric circuit, contactpoints connected with saidelectric circuit, a cylinder within the telephone standard, a pistonslidable in said cyl- 1nder,'means connected with said piston toseparate said contact points a given number of times, means connectedwith the piston to raise the same, means to permit the free upwardmovement of said piston, and means to regulate the downward movementthereof, substantially as described.

4'. In atelephone'signaling device, a telephone standard, electriccircuit wires contained therein, a c linder within said standard, aiston wit in said cylinder, means carried said piston to make and breakan electric circuit, and a finger plate on the outside of said standardand adapted to be raised to break and make said electric circuit a givennumber of times, substantially as described.

5. In a telephone signaling device, a telephone having a base, and astandard, electric circuit wires within said standard, a cylinder withinthe standard, a piston within the cylinder, circuit breaking meansconnected with said piston, a calling plate slidable on the outside ofsaid standard, and

means to regulate the downward movement of said piston, substantially asdescribed.

In testimony whereof I have hereunto set my hand this 14th day ofDecember A. D. 1910, in the presence of the two subscribing witnesses.

, ROY C. NEVIN.

Witnesses:

C. P. GRIFFIN,

Sco'r'r GRIFFIN.

Copies of this patent may be obtained toi' five cent: each, byaddressing the Commissioner of Patents,

Wanhlngton, D. C.

